Accession No

5936

Brief Description

Two pairs of mercury in glass thermometers, in vacuum flasks, c. 1950

Origin

England

Maker

Pyrex. J. P.

Class

laboratory apparatus; thermometry

Earliest Date

1950

Latest Date

1970

Inscription Date

Material

wood (pine); metal (mercury and ?); glass

Dimensions

Length (full length with thermometers in stand) 712mm; length of stand minus thermometers 376mm; width of stand 254mm; breadth of stand 251mm; length of thermometers 583mm; diameter of thermometer 20mm

Special Collection

Provenance

Transferred from the Department of Zoology, on or before 01/04/2003. Believed to be associated with the Ramsay apparatus.

Inscription

on metal cylinder: MADE IN ENGLAND
JP PYREX
on obverse of thermometers (different number on each thermometer):
MADE IN ENGLAND
E-MIL
DB34277
DL58142
DL53567

Description Notes

Two pairs of long-bulb mercury in glass low-temperature Celsius thermometers, with expansion chambers. Each pair standing in a silvered vacuum flask, held on a wooden base.

5936.1: One thermometer has a scale in centigrade from 0 to 6.4 and an expansion reservoir at the top with the numbers 00, 20, 40, 60, 80, 100 and 120. The other has a similar expansion reservoir with the inclusion of -20, and a scale ranging from -6 to 0˚C. Both have tapered ends and metal tops.

5936.2: One thermometer has a scale from -0.15 to 6.25˚C and an expansion reservoir at the top with the numbers 140, 120, 100, 80, 60, 40, 20, 00, -20. The other has a scale from 0 to 6˚C and an expansion reservoir with the numbers 120, 100, 80, 60, 40, 20, 00, and -20. Both have tapered ends and metal tops.

References

Events